Rev 2 Mar. 2019

MASTER MFG 40 & 60 GALLON 3-POINT SPRAYER

180 Lake Ave North

Paynesville, MN 56362

Phone: 320-340-6464

www.master-mfg.com

ASSEMBLY

Sprayer assembly has been mostly competed at the factory. Depending on pump choice the spray nozzles may

need to be changed to deliver optimum spray coverage. Please refer to the “Boom Operation” section for more

information.

OPERATION

Check the inside of the tank for any foreign objects or material that could cause damage to the pump.

Fill the tank with clean water. It is always better to have the tank at least half full of water before adding

the chemical to avoid possible damage to the sprayer components by an undiluted chemical concentrate.

Before initially running the sprayer, loosen the tee handle of the relief valve. This adjustment should be

checked while spraying because a pressure increase will be noted when the sprayer is shut off and the

output of the pump is by-passed back to the tank through the relief valve.

Limit the pressure to 150 psi. If, when adjusting the relief valve for more pressure, no increase in

pressure occurs, it is an indication that the maximum output of the pump is being used. When the

sprayer is shut off the pump will have to overcome the excessive tightness of the relief valve in order to

by-pass back to the tank. This will cause pump strain and possible damage and should be avoided.

Choose an operating pressure that provides a spray pattern suitable for the particular operation. Follow

the chemical manufacturer’s recommendations for mixing and rates of application carefully. Judge the

area sprayed tank full of spray material carefully to avoid over or under application rates. Do not use

your sprayer for pumping petroleum products, strong acids, paint or other thick materials with heavy

viscosity.

GENERAL SPRAYER MAINTENANCE

Most spray materials are highly corrosive. The most important aspect of long-term dependable service from the

sprayer is a thorough cleaning immediately following each use. In addition, the residue of one type of chemical

could cause an undesirable effect when a different chemical is used for a different purpose.

The most effective cleaning method is to run several rinses of clean water through the tank, pump, hose and

spray gun. A neutralizing agent such as a solution of Nutra-Sol, detergent or household ammonia, as

recommended by the chemical manufacturer, can assist in removal of a persistent chemical.

Avoid getting chemical on the engine and other external parts of the unit in order to preserve the finish.

Remove external spray material deposits when cleaning and flushing unit. A coat of wax applied to the exterior

will protect the paint and make clean up easier.

When the unit is thoroughly cleaned, drain the water from the tank, spray gun, pump boom and spray gun hose.

TROUBLESHOOTING

In the event of inefficient operation or malfunction, check the following:

1. Clean the line strainer after each use or more often, if necessary. A plugged strainer will restrict the

flow of liquid to the pump and cause it to perform poorly. Always use clean water and keep the

strainer screen in place. Sandy or gritty liquids will damage the components of the pump.

2. Check the hoses for any kings or leaks. Be sure that suction hose is not collapsed or plugged.

3. Nozzle tips should be removed and cleaned with a toothpick or similar object. Avoid nails, wires,

etc., that could damage the top opening. The nozzle screens of the boom accessory should also be

removed and cleaned periodically. Inspect and replace worn tips to insure satisfactory spraying

performance

STORAGE

This sprayer should always be cleaned and drained before storage. If the unit will be subjected to freezing

temperatures, it is imperative that the whole sprayer; pump, hoses, spray gun, gauge, etc., be completely drained

and dry. Any water left in the system could cause extensive damage when it freezes. Follow the

recommendations of the pump instructions for preventing internal pump corrosion and protection against the

rotor and rollers gumming and sticking during storage.

BOOM OPERATION

The spray nozzles used in the boom are marked with the capacity in gallon per minute of water at a pressure of

40 psi. A 3 tip has a capacity of .3 gpm at 40 psi. A 5 has a capacity of .5 gpm at 40 psi. etc.

The spray width coverage of the nozzle will vary according to the pressure, and nozzle height. The wide angle

flat spray pattern increases as the pressure is increased.

The amount of material applied by the nozzle is changed by variations in spraying speed, different capacity

nozzles, different nozzle spray width and spraying pressures. Other factors such as a heavier or lighter (specific

gravity) spraying solution, a change in the chemical-water concentration ratio, worn tip, a worn pump, wheel

slippage, a pressure drop from the gauge to the boom, and a pressure gauge variation or malfunction can also

cause variations in the rate of application. Uneven coverage can result from a clogged nozzle and a straining

screen.

The spraying pressure is usually more in relation to the type of application and the type of tip used than to the

rate of application. Since nozzle flow rate is almost proportional to the square root of pressure, it would take

four times the amount of range from 10 to 40 psi. The rate of application can be changed somewhat by

changing pressure but a considerable change is achieved by using a different capacity nozzle or (if possible) by

changing the spraying ground speed.

Dividing the spraying width of the boom in feet into 1000 determines the travel distance required to cover 1000

sq. ft. For example, an 80” spray width will cover 1000 sq. ft. in 150 ft. of travel. Periodic calibration checks at

the spraying speed and pressure assure correct application rates. The number of gallons required to refill the

tank after spraying (starting with a full tank) over a test distance is the application rate for the area of the test

distance.

Multiplying the application rate for the 1000 sq. ft. by 43.56 will determine the application rate per acre or

dividing the rate per acre by 43.56 will determine the rate per 10000 sq. ft. If unknown, spraying speed can be

determined by measuring the distance travelled in one minute. Every 88 ft. of travel is equal to 1 mph of speed.

For instance, a distance of 308 ft. in one minute divided by 88 equals 3.5 mph.

A calibration check can also be made with the unit standing still and the boom spraying at the operation RPM

and pressure. Catching the output of the one nozzle for the time it would take to travel the test distance and

multiplying by the number of nozzles on the boom will yield the application rate. Water weighs 8.34 lbs. per

gallon. Spraying solutions heavier than water will cause a reduction in nozzle output, while solutions lighter

than water will increase the nozzle output.

WARRANTY PARTS SERVICE

Products sold shall be warranted from defects in workmanship and material when used within the service and

scope for which they were designed for a period of one year from date of purchase. Contact your distributor/

dealer for replacements parts or warranty work. Please have your original sales receipt or other proof of

purchase date when requesting any warranty work.

To ensure the correct parts are acquired always provide the model number of your sprayer/attachment and the

part number and description obtained from the illustrated parts breakdown in this manual.

Gallons per Acre, 40" spacing

Nozzle part # PSI Flow GPM 4 mph 5 mph 6 mph 7 mph 8 mph 9 mph 10 mph

DF2.0 15 0.24 8.9 7.1 5.9 5.1 4.5 4.0 3.6

Red colored 20 0.28 10.4 8.3 6.9 5.9 5.2 4.6 4.2

nozzle 30 0.35 13.0 10.4 8.7 7.4 6.5 5.8 5.2

40 0.4 14.9 11.9 9.9 8.5 7.4 6.6 5.9

60 0.49 18.2 14.6 12.1 10.4 9.1 8.1 7.3

DF2.5 15 0.31 11.5 9.2 7.7 6.6 5.8 5.1 4.6

Brown colored 20 0.35 13.0 10.4 8.7 7.4 6.5 5.8 5.2

nozzle 30 0.43 16.0 12.8 10.6 9.1 8.0 7.1 6.4

40 0.5 18.6 14.9 12.4 10.6 9.3 8.3 7.4

60 0.61 22.6 18.1 15.1 12.9 11.3 10.1 9.1

DF3.0 15 0.37 13.7 11.0 9.2 7.8 6.9 6.1 5.5

Gray colored 20 0.42 15.6 12.5 10.4 8.9 7.8 6.9 6.2

nozzle 30 0.52 19.3 15.4 12.9 11.0 9.7 8.6 7.7

40 0.6 22.3 17.8 14.9 12.7 11.1 9.9 8.9

60 0.73 27.1 21.7 18.1 15.5 13.6 12.0 10.8

Note: All GPA calculations above are per nozzle.

Pump Assembly

Your pump comes attached to the tank with the Inlet Hose and Regulator Manifold already attached.

You will need to attach the Boom to the pump following the steps below and the diagrams included.

Obtain the Pressure Gauge

(1124DAB100) and thread into the Top

Port on the Regulator manifold.

Obtain the Boom Hose and thread onto

the Regulator Manifold.

Attach Spray Wand Hose to Elbow Port

on bottom of the Regulator Manifold